The "hard to come by" idea is nice, but think about it. Lex Luthor can acquire "hard to come by" because of his influence and riches. It makes little difference in the end.

And there are a trillion other things you can use for an Achilles' Heel. Personality traits are the best.

I get where you're coming from, there are many ways to nullify Superman in this vein......the most often being danger to others if Superman interferes....and they create the opportunity for Superman to out-wit the threat vs out-punch.

However there needs to be a real mortal threat, and Green K is that threat, and if rare enough on Earth, even the resources of Lex luthor become moot in it's common acquisition.

My preference.....
1. There is only green Kryptonite.
2. It is extremely rare on Earth.
3. It immediately incapacitates Superman with severe weakness. Making it impossible for him to use any active power, but it does not strip him of his powers. He is still invulnerable. Prolonged exposure results in death.
4. Lead shields it.

This discussion should also involve magic........

My preference......
1. Superman is not vulnerable to a person or weapon that is generically magic, he is vulnerable only to the specific nature of the enchantment.....i.e. .... a singing sword will not cut Superman.....a sword enchanted to cut anything and everything that physically exists.... will.

Therefore Captain Marvel has no advantage over Superman merely because his powers are magical in nature.

Agreed, Superman shouldn't turn to jelly just because of a talking club hitting him.

You're not the only one Superman Prime... I actually don't plan on seeing it in the theaters unless I just can't escape the cheers and raves about it. More then that, I'll be giving Cap America the same treatment. But to be fair I'm a DC boy so I'm pretty bias.

Dude lifts up an entire continent thats also littered with his main weakness....and fans still use that as an example of why the movie's "Bad"

What's so hard to understand? It was lack of excitement during the climax that is the chief complaint of the scene, not necessarily the power itself. Yes, lifting an island composed of your greatest weakness is an impressive feat. No, it wasn't exactly thrilling to look at.

Rescuing a burning plane is comparatively far less impressive in terms of might, but that was almost universally praised.

You're not the only one Superman Prime... I actually don't plan on seeing it in the theaters unless I just can't escape the cheers and raves about it. More then that, I'll be giving Cap America the same treatment. But to be fair I'm a DC boy so I'm pretty bias.

same here...I like DC 10x more than Marvel

__________________My father believed, if the world found out who I really was, they'd reject me...out of fear. He was convinced that the world wasn't ready. What do you think?
-Superman

i'd like for them to apply as much real science to Superman as possible without sacrificing what makes him Superman. he must be impervious to bullets and most bombs. he must have heat and x-ray vision along with cold breath and enhanced hearing. he has to have superhuman strength and the ability to fly, and of course he has to be extremely quick.

that being said i don't think he should be able to withstand a direct hit from an atomic bomb. he shouldn't be able to freeze or boil an entire ocean. he shouldn't be able move continents. he shouldn't be faster than the speed of light, and i don't think he should be able to fly out of our solar system.

he should have extraordinary powers, but he definitely should have limits. Kryptonite shouldn't be the only thing that could possibly kill him.

__________________Karma: What Goes Around Comes Around: You Get What You Give: Treat Others As You Would Like To Be Treated<-:{=:]:[my ART thread]:[:=}:->

I do think he should be able to fly in to space though...that's just cool

most definitely, but again...i think there should be a limit. if we're applying comic book science and logic, the reason he's so powerful is because he draws his power from our sun, so obviously the further away he gets away from it the weaker he should become. if he tried to fly to Krypton without a ship, then he'd eventually freeze from the lack of heat.

the opposite should be applied if he gets too close to the sun. if he gets too close to the sun he should absorb so much power that he basically explodes.

__________________Karma: What Goes Around Comes Around: You Get What You Give: Treat Others As You Would Like To Be Treated<-:{=:]:[my ART thread]:[:=}:->

I'm pretty sure that when he absorbs too much solar radiation in the comics, he essentially gets so powerful that he can't control it, i.e. he might tear someone's arm off going for a handshake, that kind of thing.